Portable back for benches



J y 0, 1943. D. P. Flecams- 2,324 570 PORTABLE BACK FOR BENCHES FiledMarh 2, 1940 2 Sheets-Sheet 1 y 1943- o. P. FlGGlNS 2,324,570

PORTABLE BA-CK FOR BENGHES Filed March 2, 1940 2" Shats-Sheet 2 IJar/aid Z? F iy yz'izs so as "to hold the back-rest in a rearwardlyinclined position'against accidental forward swinging-movement and thussecurely fastening the.

back-rest in place. 7 I

When it is desired to detach the back-rest, the

pawls 41 are disengaged from the teeth 'of the racks and the back-restis swung forwardly so as to free the jaw H- whereupon the ja'wsmay bereadily withdrawn from astride the seat.

In the form of the invention shown in Figs; 5

to 8 inclusive; the lower ends of the side mem bers l8 and I9 of theframe of 'the ba'ck rest are each fitted with a pair of jaws 50 and 5|;the jaw 50 comprising a straight bar one end of which'is" connected by apivot .52 to the lower end of the adjacent frame member l8 or [9 and theother will be engaged thus: effectively listening ithe 1. back-rest in ra rearwardly inclined positionv against the flanges 56;Thenotches'and-thede-' v .tents are roundedso.that ai'orward pull'ontheI claim:

end of which bar is adapted to overlie the mar-J;

ginal portion of the seat.

The jaw member 5| comprises a bar thatis" pivoted at 53 tothe jaw 50termediate portion 6' adapted to overlie the rear edge of the seat, anend'fportion ,f engageable and embodies an in- 1 portion of aseatandrelativetowhichsaid f with the underside of the seat, and an arcuatej.

upper end portion 9 which curves rearwardly and overlies the contiguousframe side member-I8 or 19. The upper end portion 'g of the jaw'm'ember5| is resilient and is adapted to be sprung radially, and formed on theupper edge thereof is a notch I 54-adapted to be engaged by a-rfixeddetent 55 on the adjacent side member I 8' or 19 of the back-rest frame.1 j

The outer upper end of each of the portions g "of the jaw members 5| isformed with a flange 56 extending in the path of travel of the sideframe members "to afford a stop and limit rearward movement of theback-rest and prevent the backrestand portions g of V the jaw members 5|from becoming disengaged.

" The arcua'te end portion, g extends on an' arc r40 pivoted end thereofclosest to the pivot 52, so

eccentric to the' axis of the pivot 52 with the that when the back-restis swung toward the jaw member as indicated by the broken line h in Fig.6, the outer margin of the arcuate end portion y will clear the detent55 so that the jaw' 5! may then be swung freely on the pivot 53, and

whereby the end portion f of the jaw 5| may be' swung away from thelj'aw' 50'to permit positioningof the jaws 50-5! astride the rear marginof the seat, as indicated in Fig. 6. On thus dise abutment connectionsrbfetweenfsaid frame clamping of said jaw me'rn rseon to'e.vswingingsaid frame'in onedirection posing the jaws 50- 5l astride themargin of the seat, the back-rest is swung rearwardly' thereby causingthe dete'nts 55 thereon to ride against and along the outer edge of thearcuate end portion gand to'depress the latter and cause the jaws 5l' toadvance against and grip the seat;

movement of the back-rest being continued until the detents 5's rideinto thenotches 54-whe're'they 1 back-rest will causethedetentsjtorideoutof the notches and thus iree th 'jaw'5l1andpermit' gr "spaced pairfor vertic f filvotany *pivotally' carried by said frame :2. A tbackrest ior. bench seatsscomprislng 'frame', 'a' bad is tiltable, and stopmeans forihte'retigagiri' sai frame with one of jaws and the frameiorflimithg tiltin "of a seaaas cond pair. 61 Jiivvjnembefs one pairof'said moval of the back restaz i I 1. A'backerest for; bench seats:comprising in frame, aback-rest panel on 'seidframe,-j lm; f PQ Ei R Js fidfl t 0 gage a marginal portion-of a seat and relati've'tog lwhichsaidframe is tiltable; stop'means; carried r by certain of the jaws andsaid frame forlimiting the" tiltingo f 'said frame; and meansforlocking}v I Vsaidjjawsriniclamped.position."' V

k-rest panelfonsaid frame; 5pm 7 pairs ofxpivotally connectedjjawspivotally carried bysaid framefadapted to engage" margipel vis"'tiltablefstonxrittn gegea'ibetweenrc rtam I 3 frame and meanactuated by swingingrelative tosaid' 'J'aws ffor"tightening or. saidjaws relative to' theseat engaged thereby 4; In a back-restfforseats,rest frame, a pair ofjaw mem ried by said-n me arranged t'o'enga leastone pair of fect' loosening- 0f the jaw, member's n the frame in theoppositeg directiohf and for locking's'aid jaws in clamped po'sition.

5. Astructure'called for iii-claim mammalia- I 3 1 lockingmeansprovidesftor efiectingfdetachablef interlocked connec'tion}betweenj s'aiid :framefa'nd jaw m mfi was e sam 1 against s'wi'nging'in'ia. direction f tightenedja'w members; U v V 7 Y Y DON L MGGINsv

